Question

iv) given d; = 15, S.-125, find danda
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Answer 1

Answer:

a3=15,s10=125

Step-by-step explanation:

a3=a+(3-1)d

15=a+2d

a=15-2d

s10=10/2(2a+(10-1)d)

125=s(2a+9d)

25=2a+9d

25=2(15-2d)+9d

25=30-4d+9d

5d=-5

d=-1

9=15-2×(-1)

9=17

9^10=9(10-1)(-1)

9^10=17-9

9^10=26

Answer 2

Answer:

26 is ur answer

hope it helps u