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Brilliant_brown [7]
3 years ago
11

Find the last term of an arithmetic sequence whose a=5,d=3 and n=78​

Mathematics
2 answers:
oksano4ka [1.4K]3 years ago
6 0

Step-by-step explanation:

T78 = 5 + (78-1)(3)

= 5 + 77(3)

= 5+231

= 236

STALIN [3.7K]3 years ago
5 0
<h2>>> Answer </h2>

_________

\:

Un = a + (n - 1) × b

U78 = 5 + (78 - 1) × 3

U78 = 5 + 77 × 3

U78 = 5 + 231

U78 = 236

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