Question

The 7 term of an AP is 32 and its 12 term is 57 find the AP​

Answer 1

Answer:

Hope it may help u

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Answer 2

Answer:

hope this helps u :-)

Step-by-step explanation:

aₙ=a+(n-1)d

so,

a₇=a+(7-1)d=32

=>a+6d=32                                                      ...(i)

a₁₂=a+(12-1)d=57

  =>a+11d=57                                                  ...(ii)

subtracting equation (1) from (ii)

a+11d=57  

a+6d=32  

-  -      -

________

5d=25

=>d=25÷5=5

putting the value of d in equation (ii)

a+11d=57

=>a+11(5)=57

=>a=57-55=2

so,the AP is

a=2

a₂=a+(n-1)d=2+5=7

a₃=a+(n-1)d=2+2(5)=12

a₄=a+(n-1)d=2+3(5)=17

a₅=a+(n-1)d=2+4(5)=22

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