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Finite Math Examples
P2526
Step 1
Evaluate P2526 using the formula Prn=n!(n-r)!.
26!(26-25)!
Step 2
Subtract 25 from 26.
26!(1)!
Step 3
Step 3.1
Simplify the numerator.
Step 3.1.1
Expand 26! to 26⋅25⋅24⋅23⋅22⋅21⋅20⋅19⋅18⋅17⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1.
26⋅25⋅24⋅23⋅22⋅21⋅20⋅19⋅18⋅17⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2
Multiply 26⋅25⋅24⋅23⋅22⋅21⋅20⋅19⋅18⋅17⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1.
Step 3.1.2.1
Multiply 26 by 25.
650⋅24⋅23⋅22⋅21⋅20⋅19⋅18⋅17⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.2
Multiply 650 by 24.
15600⋅23⋅22⋅21⋅20⋅19⋅18⋅17⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.3
Multiply 15600 by 23.
358800⋅22⋅21⋅20⋅19⋅18⋅17⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.4
Multiply 358800 by 22.
7893600⋅21⋅20⋅19⋅18⋅17⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.5
Multiply 7893600 by 21.
165765600⋅20⋅19⋅18⋅17⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.6
Multiply 165765600 by 20.
3315312000⋅19⋅18⋅17⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.7
Multiply 3315312000 by 19.
62990928000⋅18⋅17⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.8
Multiply 62990928000 by 18.
1133836704000⋅17⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.9
Multiply 1133836704000 by 17.
19275223968000⋅16⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.10
Multiply 19275223968000 by 16.
308403583488000⋅15⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.11
Multiply 308403583488000 by 15.
4626053752320000⋅14⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.12
Multiply 4626053752320000 by 14.
64764752532480000⋅13⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.13
Multiply 64764752532480000 by 13.
841941782922240000⋅12⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.14
Multiply 841941782922240000 by 12.
10103301395066880000⋅11⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.15
Multiply 10103301395066880000 by 11.
111136315345735680000⋅10⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.16
Multiply 111136315345735680000 by 10.
1111363153457356800000⋅9⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.17
Multiply 1111363153457356800000 by 9.
10002268381116211200000⋅8⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.18
Multiply 10002268381116211200000 by 8.
80018147048929689600000⋅7⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.19
Multiply 80018147048929689600000 by 7.
560127029342507827200000⋅6⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.20
Multiply 560127029342507827200000 by 6.
3360762176055046963200000⋅5⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.21
Multiply 3360762176055046963200000 by 5.
16803810880275234816000000⋅4⋅3⋅2⋅1(1)!
Step 3.1.2.22
Multiply 16803810880275234816000000 by 4.
67215243521100939264000000⋅3⋅2⋅1(1)!
Step 3.1.2.23
Multiply 67215243521100939264000000 by 3.
201645730563302817792000000⋅2⋅1(1)!
Step 3.1.2.24
Multiply 201645730563302817792000000 by 2.
403291461126605635584000000⋅1(1)!
Step 3.1.2.25
Multiply 403291461126605635584000000 by 1.
403291461126605635584000000(1)!
403291461126605635584000000(1)!
403291461126605635584000000(1)!
Step 3.2
Expand (1)! to 1.
4032914611266056355840000001
Step 3.3
Divide 403291461126605635584000000 by 1.
403291461126605635584000000
403291461126605635584000000