Question

which term of the series 75,72,69 ...is -75.?​

Answer 1

Answer:

here a = 75, d=-3

an =a+(n-1) d

-75= 75 +(n-1)(- 3)

-150=(n-1)( -3)

-150/3=n-1

50=n-1

n=49

Answer 2

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a = 75, d = -3

By using formula

an = a + (n - 1)d

-75 = 75 + (n-1) (-3)

-150 = (n-1) (-3)

-150/-3 = (n-1)

50 = n-1

n=50+1

n = 51

hope it helps