Question

find the sum of 10 term of AP 50,46 ,42.​

Answer 1

Answer:

a = 50

d = -4

n = 10

an = a+ (n-1) d

a10 = a+ 9d

a10 = 50 + 9 (-4)

a10 = 50 + (-36)

a10 = 50- 36

a10 = 14

a10 = l

S = n÷2 { a + l}

S = 10 ÷ 2 { 50 + 14 }

S = 5 { 64 }

S = 320

Step-by-step explanation:

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