Find the 20th term of the progression. -12, -5, 2, 9, 16, 23, 30, . . .
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Answer:
20th term of the progression is 121
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Step-by-step explanation:
a = -12 , d = -5 - ( -12) = -5 +12= 7
a20 = a +( n-1) ×d = -12 +(20-1) ×7 = -12 +19×7
= -12 +19 ×7 = -12 +133 = 121
so, 20th term of an ap is 121
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